RELEASED
DATA SHEET
PMC-2010333
ISSUE 3
PM7382 FREEDM-32P256
FRAME ENGINE AND DATA LINK MANAGER 32P256
Figure 7 – RPDRF and RPDRR Queues
Receive Packet Descriptor (RPD) Reference Queues
Base Address:
RQB[3 1:2] = Rx Q ueue Base register
Index Registers:
Large Buffer Free Q ueue:
RPDRLFQS[15:0] = RPDR L arge Free Queue Start register
RPDRLFQW [15:0] = RPD R Large F ree Queue W rite regis ter
RPDRLFQ R[15:0 ] = R PDR Large Free Queu e Read register
RPDRLFQE [15:0] = RPD R Large F ree Qu eue End register
Ready Q ueue:
RPDRRQS[15:0] = RPDR R eady Q ueue Start register
RPDRRQ W [15:0] = RPDR Ready Q ueue W rite register
RPDRRQ R[15:0] = R PDR R eady Q ueue Read register
RPDRRQ E[15:0 ] = RPDR Ready Queue End register
Sm all Bu ffer Free Queue:
RPDRSFQS[15:0] = RPDR Sm all F ree Queue Start register
RPDRSFQW [15:0] = RPD R Sm all Free Queue W rite register
RPDRSFQ R[15:0] = R PDR Sm all Free Queue Read register
RPDRSFQE [15:0] = RPDR Sm all Free Queue End register
Base Address
+ Index Register
-------------------------
Host Address
+
RQB[31:2]
Index[1 5:0 ]
AD[31:0]
00
00
Rx Packet Descriptor Reference Queue Mem ory Map
RPDRRQS
RPDRRQR
Bit 31
Status + R PDR
Status + R PDR
Status + R PDR
Bit 0
Host Mem ory
RPDRRQW
Status + R PDR
Status + R PDR
Status + R PDR
RPDRRQE
RQB
RPDRLF QS
RPDRLF QR
RPDR
RPDR
RPDR
RPD R eference Queues
256KB
RPDRLF QW
RPDR
RPDR
RPDR
RPDRLFQE
RPDRSFQS
RPDRSFQR
RPDR
RPDR
RPDR
Valid R PDR
RPDRSFQW
RPDR
RPDR
RPDRSFQE
RPDR
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA,INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
50
PMC [ PMC-SIERRA, INC ]
